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Old 10-20-2016, 08:31 AM   #1
EverydayDiesel
 
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How Important Is O-Ring'ing Head

I found a good shop that can do machine work but they only do fire ring'ing which they do not recommend on a daily driver.

Will it be ok, with compounds, to not o-ring the head? Or is this a must?


Thanks in advance
 
Old 10-20-2016, 08:47 AM   #2
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Look up isky groove o matic. You could do it yourself. Recommended.
 
Old 10-20-2016, 06:17 PM   #3
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Humm, I am not sure i can do that and keep the depth the same all the way around.

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Old 10-20-2016, 06:28 PM   #4
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Is the head off or still on truck?
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Old 10-20-2016, 06:52 PM   #5
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head and block both are currently sitting at the machine shop
 
Old 10-20-2016, 07:12 PM   #6
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You can do it yourself, the isky tool is as straight forward as it gets
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Old 10-20-2016, 07:51 PM   #7
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Watching....
 
Old 10-21-2016, 05:43 PM   #8
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Depending on what setup you're gonna have, I would lean towards the stock mls with arp 625's, you can run o-rings(a few shops can do it with 6.7s), or you can make fire rings work if you re-torque enough and run only round grooves.
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Old 10-21-2016, 06:03 PM   #9
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how often is it recommended that you retorque?
 
Old 10-21-2016, 06:08 PM   #10
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You want a few heat cycles in between each retorque. For fire-rings it will be 4-7 retorques or until they stop moving.
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Old 10-21-2016, 07:04 PM   #11
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Looks like this groove o matic needs the bore of the block to guide it. How can this be centered for the head?
 
Old 10-21-2016, 07:21 PM   #12
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Quote:
Originally Posted by LORDDiESEL View Post
Looks like this groove o matic needs the bore of the block to guide it. How can this be centered for the head?
Injector hole on a 24v, dunno on a 12v.

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Old 10-21-2016, 07:30 PM   #13
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Can't center the Isky tool on the head. It's made to cut into the block. It's really easy to do. What do you feel you HAVE to put it on the head?
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Old 10-21-2016, 09:41 PM   #14
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I dont understand how you control the depth of the cut and ensure that it says uniform across the entire cyl
 
Old 10-21-2016, 09:51 PM   #15
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Quote:
Originally Posted by EverydayDiesel View Post
I dont understand how you control the depth of the cut and ensure that it says uniform across the entire cyl
What have multiple people told you about searching? Look up a video. It close up pictures. Or one of the mutiple write up threads. Additionally, this style of tool has been around for YEARS. A lot of old school gas race car builders use them.
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Old 10-21-2016, 10:14 PM   #16
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lol there is one 'time lapse' video on youtube using this tool which does not answer my question. the rest is disco videos which i am not interested in.
 
Old 10-21-2016, 10:36 PM   #17
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95' Junker Drag Truck - Page 62 - Competition Diesel.Com - Bringing The BEST Together
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49 Willys Pickup. 5600lb. 11.8sec @115mph 1/4. 12 valve. MegaSquirted 47RH. 3.54 posi rear. 35" tires. 64mm HE351ve, S475 (75/96/1.32), A/W Intercooler. AFC mods. 5x16s. 191 DVs, 180 pump. 23*. 85psi. Build Thread
 
Old 10-22-2016, 10:19 AM   #18
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It has pins that sit on the deck of the block that are adjustable to set your depth, and the cutter is adjustable so you can set the diameter of your ring. Then you just set it on top the block and turn it until it doesn't cut anymore. It's been a year or three since I did one, but that Sums it up pretty much.
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Old 10-24-2016, 03:43 AM   #19
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Personally i wouldnt do o-rings. Id use an oem gasket and arp 625 studs
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Old 10-24-2016, 09:41 AM   #20
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^^^ I agree.
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